<template>
  <div class="type-nav">
    <div class="container">
      <div @mouseleave="leaveShow" @mouseenter="enterShow">
        <h2 class="all">全部商品分类</h2>

        <transition name="sort">
          <!-- 三级联动-->
          <div class="sort" v-show="show">
            <!--事件委派  -->
            <div class="all-sort-list2" @click="goSearch">
              <div
                class="item"
                v-for="(c1, index) in categoryList"
                :key="c1.categoryId"
                :class="{ cur: currentIndex == index }"
              >
                <h3 @mouseenter="changeIndex(index)">
                  <a
                    :data-categoryName="c1.categoryName"
                    :data-category1Id="c1.categoryId"
                    >{{ c1.categoryName }}</a
                  >
                </h3>

                <div
                  class="item-list clearfix"
                  :style="{ display: currentIndex == index ? 'block' : 'none' }"
                >
                  <div
                    class="subitem"
                    v-for="(c2,index) in c1.categoryChild"
                    :key="c2.categoryId" 
                  >
                    <dl class="fore">
                      <dt>
                        <a
                          :data-categoryName="c2.categoryName"
                          :data-category2Id="c2.categoryId"
                          @mouseenter="changeIndex_2(index)"
                          @mouseleave="leaveShow_3"
                          :class="{cur_2:currentIndex_2 === index}"
                          >{{ c2.categoryName }}</a
                        >
                      </dt>
                      <dd>
                        <em v-for="(c3,index) in c2.categoryChild" :key="c3.categoryId">
                          <a
                            :data-categoryName="c3.categoryName"
                            :data-category3Id="c3.categoryId"
                            @mouseenter="changeIndex_3(c3.categoryId)"
                            @mouseleave="leaveShow_3"
                            :class="{cur_3:currentIndex_3==c3.categoryId}"
                            >{{ c3.categoryName }}</a
                          >
                        </em>
                      </dd>
                    </dl>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </transition>
      </div>
      <nav class="nav">
        
        <router-link to="threeD">3D商品展示</router-link>
        <router-link to="gozhibo">虚拟直播</router-link>
        <router-link to="goyuan">3D产品ip</router-link>
        <router-link to="gozhihui">元宇宙乡村</router-link>
        <a href="###">闪购</a>
        <a href="###">优惠团购</a>
        <a href="###">有趣</a>
        <a href="###">生鲜</a>
      </nav>
    </div>
  </div>
</template>

<script>
import throttle from "lodash/throttle";
import { mapState } from "vuex";
export default {
  name: "MyTypeNav",
  data() {
    return {
      currentIndex: -1,
      currentIndex_2:-1,
      currentIndex_3:-1,
      show: true,
    };
  },
  mounted() {
    if (this.$route.path !== "/home") {
      this.show = false;
    }
  },
  methods: {
    changeIndex: throttle(function (index) {
      this.currentIndex = index;
    }, 50),

    changeIndex_2: throttle(function (index) {
      this.currentIndex_2 = index;
    }, 50),
    changeIndex_3: throttle(function (index) {
      this.currentIndex_3 = index;
    }, 50),
    goSearch(event) {
      let element = event.target;

      let { categoryname, category1id, category2id, category3id } =
        element.dataset;

      if (categoryname) {
        let location = {
          name: "Search",
        };
        let query = {
          categoryName: categoryname,
        };
        if (category1id) {
          query.category1Id = category1id;
        } else if (category2id) {
          query.category2Id = category2id;
        } else  {
          query.category3Id = category3id;
        }
     
        if (this.$route.params) {
          location.query = query;
          location.params = this.$route.params;

          this.$router.push(location);
        }
      }
    },
    threeD(){
      
      this.$router.push({ name: "threeD" });
    },
    gozhihui(){
      this.$router.push({ name: "gozhihui" });

     
    },
    goyuan(){
      this.$router.push({ name: "goyuan" });
    
    },
    gozhibo(){
      this.$router.push({ name: "gozhibo" });
    
     
    },
    enterShow() {
      this.show = true;
    },

    leaveShow: throttle(function (index) {
      // 控制列表动态类名的初始值 -1 表示具体节点没触发事件前不显示背景颜色
      this.currentIndex = -1;

      // 该组件处于非home组件时 鼠标离开事件触发时 三级分类隐藏
      if (this.$route.path != "/home") {
        this.show = false;
      }
    }),
   
    leaveShow_3(){
      this.currentIndex_3=-1,
      this.currentIndex_2=-1
    }
  },

  computed: {
    // mapState也可通过调用state中的属性并指定
    ...mapState({
      categoryList: (state) => state.home.categoryList.slice(0, 15),
    }),
  },
};
</script>

<style lang="less" scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: skyblue;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

      
        }
        .cur {
          background-color: pink;
        }
        .cur_2{
          background-color: rgba(255, 166, 0, 0.455);
        }
        .cur_3{
          background-color: rgba(0, 128, 0, 0.299);
        }
      }
    }
    .sort-enter {
      height: 0;
    }
    .sort-enter-to {
      height: 461px;
    }
    .sort-enter-active {
      transition: all 0.3s linear;
    }
    .sort-leave {
      height: 461px;
    }
    .sort-leave-to {
      height: 0px;
    }
    .sort-leave-active {
      transition: all 0.1s linear;
    }
  }
}
</style>
